mcs/class/System/System.Net/HttpListenerRequest.cs

   1 //
   2 // System.Net.HttpListenerRequest
   3 //
   4 // Author:
   5 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   6 //
   7 // Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28 #if NET_2_0
  29 using System.Collections;
  30 using System.Collections.Specialized;
  31 using System.Globalization;
  32 using System.IO;
  33 using System.Security.Cryptography.X509Certificates;
  34 using System.Text;
  35 namespace System.Net {
  36         public sealed class HttpListenerRequest
  37         {
  38                 string [] accept_types;
  39                 int client_cert_error;
  40                 Encoding content_encoding;
  41                 long content_length;
  42                 bool cl_set;
  43                 CookieCollection cookies;
  44                 WebHeaderCollection headers;
  45                 string method;
  46                 Stream input_stream;
  47                 bool is_authenticated;
  48                 Version version;
  49                 NameValueCollection query_string; // check if null is ok, check if read-only, check case-sensitiveness
  50                 string raw_url;
  51                 Guid identifier;
  52                 Uri url;
  53                 Uri referrer;
  54                 string [] user_languages;
  55                 bool no_get_certificate;
  56                 HttpListenerContext context;
  57                 bool is_chunked;
  58                 static byte [] _100continue = Encoding.ASCII.GetBytes ("HTTP/1.1 100 Continue\r\n\r\n");
  59
  60                 internal HttpListenerRequest (HttpListenerContext context)
  61                 {
  62                         this.context = context;
  63                         headers = new WebHeaderCollection ();
  64                         input_stream = Stream.Null;
  65                 }
  66
  67                 static char [] separators = new char [] { ' ' };
  68                 // From WebRequestMethods.Http
  69                 static readonly string [] methods = new string [] { "GET", "POST", "HEAD",
  70                                                                 "PUT", "CONNECT", "MKCOL" };
  71                 internal void SetRequestLine (string req)
  72                 {
  73                         string [] parts = req.Split (separators, 3);
  74                         if (parts.Length != 3) {
  75                                 context.ErrorMessage = "Invalid request line (parts).";
  76                                 return;
  77                         }
  78
  79                         method = parts [0];
  80                         if (Array.IndexOf (methods, method) == -1) {
  81                                 context.ErrorMessage = "Invalid request line (verb).";
  82                                 return;
  83                         }
  84
  85                         raw_url = parts [1];
  86                         if (parts [2].Length != 8 || !parts [2].StartsWith ("HTTP/")) {
  87                                 context.ErrorMessage = "Invalid request line (version).";
  88                                 return;
  89                         }
  90
  91                         try {
  92                                 version = new Version (parts [2].Substring (5));
  93                                 if (version.Major < 1)
  94                                         throw new Exception ();
  95                         } catch {
  96                                 context.ErrorMessage = "Invalid request line (version).";
  97                                 return;
  98                         }
  99                 }
 100
 101                 void CreateQueryString (string query)
 102                 {
 103                         query_string = new NameValueCollection ();
 104                         if (query == null || query.Length == 0)
 105                                 return;
 106
 107                         string [] components = query.Split ('&');
 108                         foreach (string kv in components) {
 109                                 int pos = kv.IndexOf ('=');
 110                                 if (pos == -1) {
 111                                         query_string.Add (null, HttpUtility.UrlDecode (kv));
 112                                 } else {
 113                                         string key = HttpUtility.UrlDecode (kv.Substring (0, pos));
 114                                         string val = HttpUtility.UrlDecode (kv.Substring (pos + 1));
 115
 116                                         query_string.Add (key, val);
 117                                 }
 118                         }
 119                 }
 120
 121                 internal void FinishInitialization ()
 122                 {
 123                         string host = UserHostName;
 124                         if (version > HttpVersion.Version10 && (host == null || host == "")) {
 125                                 context.ErrorMessage = "Invalid host name";
 126                                 return;
 127                         }
 128
 129                         if (host == null || host == "")
 130                                 host = UserHostAddress;
 131
 132                         int colon = host.IndexOf (':');
 133                         if (colon >= 0)
 134                                 host = host.Substring (0, colon);
 135
 136                         string base_uri = String.Format ("{0}://{1}:{2}",
 137                                                                 (IsSecureConnection) ? "https" : "http",
 138                                                                 host,
 139                                                                 LocalEndPoint.Port);
 140                         try {
 141                                 url = new Uri (base_uri + raw_url);
 142                         } catch {
 143                                 context.ErrorMessage = "Invalid url";
 144                                 return;
 145                         }
 146
 147                         CreateQueryString (url.Query);
 148
 149                         if (method == "GET" || method == "HEAD")
 150                                 return;
 151
 152                         string t_encoding = null;
 153                         if (version >= HttpVersion.Version11) {
 154                                 t_encoding = Headers ["Transfer-Encoding"];
 155                                 // 'identity' is not valid!
 156                                 if (t_encoding != null && t_encoding != "chunked") {
 157                                         context.Connection.SendError (null, 501);
 158                                         return;
 159                                 }
 160                         }
 161
 162                         bool is_chunked = (t_encoding == "chunked");
 163                         if (!is_chunked && !cl_set) {
 164                                 context.Connection.SendError (null, 411);
 165                                 return;
 166                         }
 167
 168                         if (is_chunked || content_length > 0) {
 169                                 input_stream = context.Connection.GetRequestStream (is_chunked, content_length);
 170                         }
 171
 172                         if (Headers ["Expect"] == "100-continue") {
 173                                 ResponseStream output = context.Connection.GetResponseStream ();
 174                                 output.InternalWrite (_100continue, 0, _100continue.Length);
 175                         }
 176                 }
 177
 178                 internal void AddHeader (string header)
 179                 {
 180                         int colon = header.IndexOf (':');
 181                         if (colon == -1 || colon == 0) {
 182                                 context.ErrorMessage = "Bad Request";
 183                                 return;
 184                         }
 185
 186                         string name = header.Substring (0, colon).Trim ();
 187                         string val = header.Substring (colon + 1).Trim ();
 188                         string lower = name.ToLower (CultureInfo.InvariantCulture);
 189                         headers.SetInternal (name, val);
 190                         switch (lower) {
 191                                 case "accept-language":
 192                                         user_languages = val.Split (','); // yes, only split with a ','
 193                                         break;
 194                                 case "accept-types":
 195                                         accept_types = val.Split (','); // yes, only split with a ','
 196                                         break;
 197                                 case "content-length":
 198                                         try {
 199                                                 //TODO: max. content_length?
 200                                                 content_length = Int64.Parse (val.Trim ());
 201                                                 if (content_length < 0)
 202                                                         context.ErrorMessage = "Invalid Content-Length.";
 203                                                 cl_set = true;
 204                                         } catch {
 205                                                 context.ErrorMessage = "Invalid Content-Length.";
 206                                         }
 207
 208                                         break;
 209                                 case "referer":
 210                                         try {
 211                                                 referrer = new Uri (val);
 212                                         } catch {
 213                                                 referrer = new Uri ("http://someone.is.screwing.with.the.headers.com/");
 214                                         }
 215                                         break;
 216                                 //TODO: cookie headers
 217                         }
 218                 }
 219
 220                 public string [] AcceptTypes {
 221                         get { return accept_types; }
 222                 }
 223
 224                 public int ClientCertificateError {
 225                         get {
 226                                 if (no_get_certificate)
 227                                         throw new InvalidOperationException (
 228                                                 "Call GetClientCertificate() before calling this method.");
 229                                 return client_cert_error;
 230                         }
 231                 }
 232
 233                 public Encoding ContentEncoding {
 234                         get {
 235                                 if (content_encoding == null)
 236                                         content_encoding = Encoding.Default;
 237                                 return content_encoding;
 238                         }
 239                 }
 240
 241                 public long ContentLength64 {
 242                         get { return content_length; }
 243                 }
 244
 245                 public string ContentType {
 246                         get { return headers ["content-type"]; }
 247                 }
 248
 249                 public CookieCollection Cookies {
 250                         get {
 251                                 // TODO: check if the collection is read-only
 252                                 if (cookies == null)
 253                                         cookies = new CookieCollection ();
 254                                 return cookies;
 255                         }
 256                 }
 257
 258                 public bool HasEntityBody {
 259                         get { return (method == "GET" || method == "HEAD" || content_length <= 0 || is_chunked); }
 260                 }
 261
 262                 public NameValueCollection Headers {
 263                         get { return headers; }
 264                 }
 265
 266                 public string HttpMethod {
 267                         get { return method; }
 268                 }
 269
 270                 public Stream InputStream {
 271                         get { return input_stream; }
 272                 }
 273
 274                 public bool IsAuthenticated {
 275                         get { return is_authenticated; }
 276                 }
 277
 278                 public bool IsLocal {
 279                         get { return IPAddress.IsLoopback (RemoteEndPoint.Address); }
 280                 }
 281
 282                 public bool IsSecureConnection {
 283                         get { return context.Connection.IsSecure; }
 284                 }
 285
 286                 public bool KeepAlive {
 287                         get { return false; }
 288                 }
 289
 290                 public IPEndPoint LocalEndPoint {
 291                         get { return context.Connection.LocalEndPoint; }
 292                 }
 293
 294                 public Version ProtocolVersion {
 295                         get { return version; }
 296                 }
 297
 298                 public NameValueCollection QueryString {
 299                         get { return query_string; }
 300                 }
 301
 302                 public string RawUrl {
 303                         get { return raw_url; }
 304                 }
 305
 306                 public IPEndPoint RemoteEndPoint {
 307                         get { return context.Connection.RemoteEndPoint; }
 308                 }
 309
 310                 public Guid RequestTraceIdentifier {
 311                         get { return identifier; }
 312                 }
 313
 314                 public Uri Url {
 315                         get { return url; }
 316                 }
 317
 318                 public Uri UrlReferrer {
 319                         get { return referrer; }
 320                 }
 321
 322                 public string UserAgent {
 323                         get { return headers ["user-agent"]; }
 324                 }
 325
 326                 public string UserHostAddress {
 327                         get { return LocalEndPoint.ToString (); }
 328                 }
 329
 330                 public string UserHostName {
 331                         get { return headers ["host"]; }
 332                 }
 333
 334                 public string [] UserLanguages {
 335                         get { return user_languages; }
 336                 }
 337
 338                 public IAsyncResult BeginGetClientCertificate (AsyncCallback requestCallback, Object state)
 339                 {
 340                         return null;
 341                 }
 342 #if SECURITY_DEP
 343                 public X509Certificate2 EndGetClientCertificate (IAsyncResult asyncResult)
 344                 {
 345                         return null;
 346                         // set no_client_certificate once done.
 347                 }
 348
 349                 public X509Certificate2 GetClientCertificate ()
 350                 {
 351                         // set no_client_certificate once done.
 352
 353                         // InvalidOp if call in progress.
 354                         return null;
 355                 }
 356 #endif
 357         }
 358 }
 359 #endif
 360